NOAA/ESRL/PSD Catalog http://www.esrl.noaa.gov/psd/thredds/catalog/Datasets/gpcc/catalog.html

Dataset Size Last Modified
     Folder  gpcc   --
         Folder  combined/   --
         Folder  first_guess/   --
         Folder  full_v6/   --
         Folder  full_v7/   --
         Folder  monitor/   --

NOAA/ESRL/PSD at NOAA ESRL PSD see Info
THREDDS Data Server [Version 4.3.15 - 20121218.1126] Documentation